Peronospora rubi Rabenhorst, 1886
on Rubus
gall
underside of the leaves with a greyish fungal down of erect conidiophores that apically several times are dichotomously branching, each branch ending upon a conidium. Embedded in the host tissue lie brown, thick-walled, smooth oospores. Upper side of the leaves with yellow, angular leaf spots.
host plants
Rosaceae, monophagous
Rubus caesius, fruticosus, gracilis, idaeus, laciniatus, plicatus.
references
Brandenburger (1985a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2019a), Kruse, Thiel, Beenken ao (2018d), Müller & Kokeš (2008a).